ModernUO/Projects/Server.Tests/Tests/Buffers/SpanWriterTests.cs
Kamron Batman 9a25054809
test: remove trivial, duplicate and content-value tests (#2721)
## Summary
Many tests proved a specific change when it landed but don't need to run on every CI build forever. This removes **202 test methods and 9 files: 313 test cases, 2,247 → 1,934**. UOContent.Tests drops from about 14s to about 5s locally.

Removed:
- **Tautologies.** Asserting a constant, a constructor readback or a trivial getter, or testing BCL behavior.
- **Exact duplicates** of a surviving test on the same code path.
- **Obsolete regressions** whose failure can no longer be expressed.
- **Game-content values** shard owners customize (era drop rates, loot and skill tables, single-creature tuning). Each customization would otherwise force a test fix.

## How it was decided
1. Every test was classified, with a reason, by a per-shard sweep over all 287 test files.
2. Each proposed deletion was then checked by a second, adversarial reviewer against the surviving tests and the production code.
3. Anything that was the only coverage of a separate code path was **kept**, even where it looked like a duplicate. Examples: the unsigned `SpanReader`/`SpanWriter` methods, the at-location versus bounds enumerators, null-map enumerables, the security filters, archive-journal state transitions. About 130 proposed deletions were rejected this way.

Whole files removed:
- `FishingTests`, apart from 3 tests: the map-edge scan, serpent cleanup, and SOS chest consumption. The SOS test now stops at the first chest instead of measuring a catch rate. The multi-million-cast rate simulations are gone.
- `LordOaksTests` and `MeerEnragedTests` (single-creature tests).
- `AutoArchiveHelperTests`, `JsonDiscoverableTypeAttributeTests`, `DecimalSerializationTests` and `EnumConversionTests` (tautologies, or tests of their own local helpers).
- `NetworkStatsTests`.
- `MigratedDataLoadTests` (a subset of `AllSpawnFilesLoadTests`).
- `SpawnerFixtureCapture`: a capture tool, not a test, and its `version == 12` assert can no longer pass. The `.bin` fixtures it produced stay.

## Tests
- Server.Tests: 811 pass.
- UOContent.Tests: 1,123 pass.

A follow-up PR, stacked on this one, fixes how the remaining tests behave: shared state, CI-vacuous tests, harness duplication.
2026-10-18 20:08:19 -07:00

519 lines
13 KiB
C#

using System;
using System.Buffers;
using System.IO;
using Xunit;
namespace Server.Tests.Buffers;
public class SpanWriterTests
{
[Fact]
public unsafe void TestSpanWriterResizes()
{
Span<byte> smallStack = stackalloc byte[8];
var writer = new SpanWriter(smallStack, true);
writer.Write(0x1024L);
writer.Write(0x1024L);
var span = writer.RawBuffer;
fixed (byte* spanPtr = span)
{
fixed (byte* stackPtr = smallStack)
{
Assert.True(spanPtr != stackPtr);
}
}
Assert.True(span.Length > smallStack.Length);
writer.Dispose();
}
[Fact]
public unsafe void TestSpanWriterOnlyStackAlloc()
{
Span<byte> smallStack = stackalloc byte[8];
var writer = new SpanWriter(smallStack, true);
writer.Write(0x1024L);
var span = writer.RawBuffer;
fixed (byte* spanPtr = span)
{
fixed (byte* stackPtr = smallStack)
{
Assert.True(spanPtr == stackPtr);
}
}
Assert.Equal(8, span.Length);
AssertThat.Equal(smallStack, [0, 0, 0, 0, 0, 0, 0x10, 0x24]);
}
[Fact]
public void TestSpanWriterNoResizeThrows()
{
Assert.Throws<InvalidOperationException>(
() =>
{
Span<byte> smallStack = stackalloc byte[8];
var writer = new SpanWriter(smallStack);
writer.Write(0x1024L);
writer.Write(0x1024L);
}
);
}
[Fact]
public void TestWriteBool()
{
Span<byte> buffer = stackalloc byte[2];
var writer = new SpanWriter(buffer);
writer.Write(true);
writer.Write(false);
Assert.Equal(2, writer.Position);
AssertThat.Equal(writer.Span, [1, 0]);
}
[Fact]
public void TestWriteSByte()
{
Span<byte> buffer = stackalloc byte[2];
var writer = new SpanWriter(buffer);
writer.Write((sbyte)-1);
writer.Write((sbyte)127);
Assert.Equal(2, writer.Position);
AssertThat.Equal(writer.Span, [0xFF, 0x7F]);
}
[Fact]
public void TestWriteInt16BigEndian()
{
Span<byte> buffer = stackalloc byte[2];
var writer = new SpanWriter(buffer);
writer.Write((short)0x1234);
Assert.Equal(2, writer.Position);
AssertThat.Equal(writer.Span, [0x12, 0x34]);
}
[Fact]
public void TestWriteInt16LittleEndian()
{
Span<byte> buffer = stackalloc byte[2];
var writer = new SpanWriter(buffer);
writer.WriteLE((short)0x1234);
Assert.Equal(2, writer.Position);
AssertThat.Equal(writer.Span, [0x34, 0x12]);
}
[Fact]
public void TestWriteUInt16BigEndian()
{
Span<byte> buffer = stackalloc byte[2];
var writer = new SpanWriter(buffer);
writer.Write((ushort)0x1234);
Assert.Equal(2, writer.Position);
AssertThat.Equal(writer.Span, [0x12, 0x34]);
}
[Fact]
public void TestWriteUInt16LittleEndian()
{
Span<byte> buffer = stackalloc byte[2];
var writer = new SpanWriter(buffer);
writer.WriteLE((ushort)0x1234);
Assert.Equal(2, writer.Position);
AssertThat.Equal(writer.Span, [0x34, 0x12]);
}
[Fact]
public void TestWriteInt32BigEndian()
{
Span<byte> buffer = stackalloc byte[4];
var writer = new SpanWriter(buffer);
writer.Write(0x12345678);
Assert.Equal(4, writer.Position);
AssertThat.Equal(writer.Span, [0x12, 0x34, 0x56, 0x78]);
}
[Fact]
public void TestWriteInt32LittleEndian()
{
Span<byte> buffer = stackalloc byte[4];
var writer = new SpanWriter(buffer);
writer.WriteLE(0x12345678);
Assert.Equal(4, writer.Position);
AssertThat.Equal(writer.Span, [0x78, 0x56, 0x34, 0x12]);
}
[Fact]
public void TestWriteUInt32BigEndian()
{
Span<byte> buffer = stackalloc byte[4];
var writer = new SpanWriter(buffer);
writer.Write(0x12345678u);
Assert.Equal(4, writer.Position);
AssertThat.Equal(writer.Span, [0x12, 0x34, 0x56, 0x78]);
}
[Fact]
public void TestWriteUInt32LittleEndian()
{
Span<byte> buffer = stackalloc byte[4];
var writer = new SpanWriter(buffer);
writer.WriteLE(0x12345678u);
Assert.Equal(4, writer.Position);
AssertThat.Equal(writer.Span, [0x78, 0x56, 0x34, 0x12]);
}
[Fact]
public void TestWriteInt64BigEndian()
{
Span<byte> buffer = stackalloc byte[8];
var writer = new SpanWriter(buffer);
writer.Write(0x123456789ABCDEF0L);
Assert.Equal(8, writer.Position);
AssertThat.Equal(writer.Span, [0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC, 0xDE, 0xF0]);
}
[Fact]
public void TestWriteUInt64BigEndian()
{
Span<byte> buffer = stackalloc byte[8];
var writer = new SpanWriter(buffer);
writer.Write(0x123456789ABCDEF0UL);
Assert.Equal(8, writer.Position);
AssertThat.Equal(writer.Span, [0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC, 0xDE, 0xF0]);
}
[Fact]
public void TestWriteSpan()
{
Span<byte> buffer = stackalloc byte[6];
var writer = new SpanWriter(buffer);
ReadOnlySpan<byte> data = [0x01, 0x02, 0x03];
writer.Write(data);
writer.Write(data);
Assert.Equal(6, writer.Position);
AssertThat.Equal(writer.Span, [0x01, 0x02, 0x03, 0x01, 0x02, 0x03]);
}
[Fact]
public void TestWriteAsciiString()
{
Span<byte> buffer = stackalloc byte[5];
var writer = new SpanWriter(buffer);
writer.WriteAscii("Hello");
Assert.Equal(5, writer.Position);
AssertThat.Equal(writer.Span, "Hello"u8);
}
[Fact]
public void TestWriteAsciiStringNull()
{
Span<byte> buffer = stackalloc byte[6];
var writer = new SpanWriter(buffer);
writer.WriteAsciiNull("Hello");
Assert.Equal(6, writer.Position);
AssertThat.Equal(writer.Span, "Hello\0"u8);
}
[Fact]
public void TestWriteAsciiStringFixedLength()
{
Span<byte> buffer = stackalloc byte[10];
var writer = new SpanWriter(buffer);
writer.WriteAscii("Hello", 10);
Assert.Equal(10, writer.Position);
AssertThat.Equal(writer.Span, "Hello\0\0\0\0\0"u8);
}
[Fact]
public void TestWriteUTF8String()
{
Span<byte> buffer = stackalloc byte[5];
var writer = new SpanWriter(buffer);
writer.WriteUTF8("Hello");
Assert.Equal(5, writer.Position);
AssertThat.Equal(writer.Span, "Hello"u8);
}
[Fact]
public void TestWriteUTF8StringNull()
{
Span<byte> buffer = stackalloc byte[6];
var writer = new SpanWriter(buffer);
writer.WriteUTF8Null("Hello");
Assert.Equal(6, writer.Position);
AssertThat.Equal(writer.Span, "Hello\0"u8);
}
[Fact]
public void TestWriteLittleUniString()
{
Span<byte> buffer = stackalloc byte[10];
var writer = new SpanWriter(buffer);
writer.WriteLittleUni("Hello");
Assert.Equal(10, writer.Position);
AssertThat.Equal(writer.Span, "H\0e\0l\0l\0o\0"u8);
}
[Fact]
public void TestWriteLittleUniStringNull()
{
Span<byte> buffer = stackalloc byte[12];
var writer = new SpanWriter(buffer);
writer.WriteLittleUniNull("Hello");
Assert.Equal(12, writer.Position);
AssertThat.Equal(writer.Span, "H\0e\0l\0l\0o\0\0\0"u8);
}
[Fact]
public void TestWriteBigUniString()
{
Span<byte> buffer = stackalloc byte[10];
var writer = new SpanWriter(buffer);
writer.WriteBigUni("Hello");
Assert.Equal(10, writer.Position);
AssertThat.Equal(writer.Span, "\0H\0e\0l\0l\0o"u8);
}
[Fact]
public void TestWriteBigUniStringNull()
{
Span<byte> buffer = stackalloc byte[12];
var writer = new SpanWriter(buffer);
writer.WriteBigUniNull("Hello");
Assert.Equal(12, writer.Position);
AssertThat.Equal(writer.Span, "\0H\0e\0l\0l\0o\0\0"u8);
}
[Fact]
public void TestClear()
{
Span<byte> buffer = stackalloc byte[10];
buffer.Fill(0xFF);
var writer = new SpanWriter(buffer);
writer.Write((byte)0x01);
writer.Clear(5);
writer.Write((byte)0x02);
Assert.Equal(7, writer.Position);
AssertThat.Equal(writer.Span, [0x01, 0, 0, 0, 0, 0, 0x02]);
}
[Fact]
public void TestSeekBegin()
{
Span<byte> buffer = stackalloc byte[10];
var writer = new SpanWriter(buffer);
writer.Write((byte)0x01);
writer.Write((byte)0x02);
writer.Write((byte)0x03);
var pos = writer.Seek(1, SeekOrigin.Begin);
Assert.Equal(1, pos);
Assert.Equal(1, writer.Position);
Assert.Equal(3, writer.BytesWritten);
}
[Fact]
public void TestSeekCurrent()
{
Span<byte> buffer = stackalloc byte[10];
var writer = new SpanWriter(buffer);
writer.Write((byte)0x01);
writer.Write((byte)0x02);
var pos = writer.Seek(2, SeekOrigin.Current);
Assert.Equal(4, pos);
Assert.Equal(4, writer.Position);
}
[Fact]
public void TestSeekEnd()
{
Span<byte> buffer = stackalloc byte[10];
var writer = new SpanWriter(buffer);
writer.Write((byte)0x01);
writer.Write((byte)0x02);
writer.Write((byte)0x03);
var pos = writer.Seek(-1, SeekOrigin.End);
Assert.Equal(2, pos);
Assert.Equal(2, writer.Position);
}
[Fact]
public void TestSeekNegativeThrows()
{
Assert.Throws<ArgumentOutOfRangeException>(
() =>
{
Span<byte> buffer = stackalloc byte[10];
var writer = new SpanWriter(buffer);
writer.Seek(-1, SeekOrigin.Begin);
}
);
}
[Fact]
public void TestSeekBeyondCapacityNoResizeThrows()
{
Assert.Throws<InvalidOperationException>(
() =>
{
Span<byte> buffer = stackalloc byte[10];
var writer = new SpanWriter(buffer);
writer.Seek(20, SeekOrigin.Begin);
}
);
}
[Fact]
public void TestSeekBeyondCapacityWithResize()
{
var writer = new SpanWriter(10, true);
var pos = writer.Seek(20, SeekOrigin.Begin);
Assert.Equal(20, pos);
Assert.True(writer.Capacity >= 20);
writer.Dispose();
}
[Fact]
public void TestEnsureCapacityNoResizeThrows()
{
Assert.Throws<InvalidOperationException>(
() =>
{
Span<byte> buffer = stackalloc byte[10];
var writer = new SpanWriter(buffer);
writer.EnsureCapacity(20);
}
);
}
[Fact]
public void TestEnsureCapacityWithResize()
{
var writer = new SpanWriter(10, true);
writer.EnsureCapacity(50);
Assert.True(writer.Capacity >= 50);
writer.Dispose();
}
[Fact]
public void TestToSpanWithStackAlloc()
{
Span<byte> buffer = stackalloc byte[10];
var writer = new SpanWriter(buffer);
writer.Write((byte)0x01);
writer.Write((byte)0x02);
writer.Write((byte)0x03);
using var owner = writer.ToSpan();
Assert.Equal(3, owner.Span.Length);
AssertThat.Equal(owner.Span, [0x01, 0x02, 0x03]);
}
[Fact]
public void TestToSpanWithRentedBuffer()
{
var writer = new SpanWriter(10);
writer.Write((byte)0x01);
writer.Write((byte)0x02);
writer.Write((byte)0x03);
using var owner = writer.ToSpan();
Assert.Equal(3, owner.Span.Length);
AssertThat.Equal(owner.Span, [0x01, 0x02, 0x03]);
}
[Fact]
public void TestToSpanEmpty()
{
var writer = new SpanWriter(10);
using var owner = writer.ToSpan();
Assert.Equal(0, owner.Span.Length);
}
[Fact]
public void TestBytesWritten()
{
Span<byte> buffer = stackalloc byte[10];
var writer = new SpanWriter(buffer);
Assert.Equal(0, writer.BytesWritten);
writer.Write((byte)0x01);
Assert.Equal(1, writer.BytesWritten);
writer.Write((ushort)0x0203);
Assert.Equal(3, writer.BytesWritten);
writer.Seek(1, SeekOrigin.Begin);
Assert.Equal(3, writer.BytesWritten);
writer.Write((byte)0xFF);
Assert.Equal(3, writer.BytesWritten);
}
}